shared.c (view raw)
1/* shared.c: global vars + some callback functions
2 *
3 * Copyright (C) 2006 Lars Hjemli
4 *
5 * Licensed under GNU General Public License v2
6 * (see COPYING for full license text)
7 */
8
9#include "cgit.h"
10#include <stdio.h>
11
12struct cgit_repolist cgit_repolist;
13struct cgit_context ctx;
14
15int chk_zero(int result, char *msg)
16{
17 if (result != 0)
18 die("%s: %s", msg, strerror(errno));
19 return result;
20}
21
22int chk_positive(int result, char *msg)
23{
24 if (result <= 0)
25 die("%s: %s", msg, strerror(errno));
26 return result;
27}
28
29int chk_non_negative(int result, char *msg)
30{
31 if (result < 0)
32 die("%s: %s", msg, strerror(errno));
33 return result;
34}
35
36char *cgit_default_repo_desc = "[no description]";
37struct cgit_repo *cgit_add_repo(const char *url)
38{
39 struct cgit_repo *ret;
40
41 if (++cgit_repolist.count > cgit_repolist.length) {
42 if (cgit_repolist.length == 0)
43 cgit_repolist.length = 8;
44 else
45 cgit_repolist.length *= 2;
46 cgit_repolist.repos = xrealloc(cgit_repolist.repos,
47 cgit_repolist.length *
48 sizeof(struct cgit_repo));
49 }
50
51 ret = &cgit_repolist.repos[cgit_repolist.count-1];
52 memset(ret, 0, sizeof(struct cgit_repo));
53 ret->url = trim_end(url, '/');
54 ret->name = ret->url;
55 ret->path = NULL;
56 ret->desc = cgit_default_repo_desc;
57 ret->owner = NULL;
58 ret->section = ctx.cfg.section;
59 ret->snapshots = ctx.cfg.snapshots;
60 ret->enable_commit_graph = ctx.cfg.enable_commit_graph;
61 ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
62 ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
63 ret->enable_remote_branches = ctx.cfg.enable_remote_branches;
64 ret->enable_subject_links = ctx.cfg.enable_subject_links;
65 ret->max_stats = ctx.cfg.max_stats;
66 ret->commit_sort = ctx.cfg.commit_sort;
67 ret->module_link = ctx.cfg.module_link;
68 ret->readme = ctx.cfg.readme;
69 ret->mtime = -1;
70 ret->about_filter = ctx.cfg.about_filter;
71 ret->commit_filter = ctx.cfg.commit_filter;
72 ret->source_filter = ctx.cfg.source_filter;
73 ret->clone_url = ctx.cfg.clone_url;
74 ret->submodules.strdup_strings = 1;
75 return ret;
76}
77
78struct cgit_repo *cgit_get_repoinfo(const char *url)
79{
80 int i;
81 struct cgit_repo *repo;
82
83 for (i = 0; i < cgit_repolist.count; i++) {
84 repo = &cgit_repolist.repos[i];
85 if (!strcmp(repo->url, url))
86 return repo;
87 }
88 return NULL;
89}
90
91void *cgit_free_commitinfo(struct commitinfo *info)
92{
93 free(info->author);
94 free(info->author_email);
95 free(info->committer);
96 free(info->committer_email);
97 free(info->subject);
98 free(info->msg);
99 free(info->msg_encoding);
100 free(info);
101 return NULL;
102}
103
104char *trim_end(const char *str, char c)
105{
106 int len;
107
108 if (str == NULL)
109 return NULL;
110 len = strlen(str);
111 while (len > 0 && str[len - 1] == c)
112 len--;
113 if (len == 0)
114 return NULL;
115 return xstrndup(str, len);
116}
117
118char *ensure_end(const char *str, char c)
119{
120 size_t len = strlen(str);
121 char *result;
122
123 if (len && str[len - 1] == c)
124 return xstrndup(str, len);
125
126 result = xmalloc(len + 2);
127 memcpy(result, str, len);
128 result[len] = '/';
129 result[len + 1] = '\0';
130 return result;
131}
132
133char *strlpart(char *txt, int maxlen)
134{
135 char *result;
136
137 if (!txt)
138 return txt;
139
140 if (strlen(txt) <= maxlen)
141 return txt;
142 result = xmalloc(maxlen + 1);
143 memcpy(result, txt, maxlen - 3);
144 result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
145 result[maxlen] = '\0';
146 return result;
147}
148
149char *strrpart(char *txt, int maxlen)
150{
151 char *result;
152
153 if (!txt)
154 return txt;
155
156 if (strlen(txt) <= maxlen)
157 return txt;
158 result = xmalloc(maxlen + 1);
159 memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
160 result[0] = result[1] = result[2] = '.';
161 return result;
162}
163
164void cgit_add_ref(struct reflist *list, struct refinfo *ref)
165{
166 size_t size;
167
168 if (list->count >= list->alloc) {
169 list->alloc += (list->alloc ? list->alloc : 4);
170 size = list->alloc * sizeof(struct refinfo *);
171 list->refs = xrealloc(list->refs, size);
172 }
173 list->refs[list->count++] = ref;
174}
175
176static struct refinfo *cgit_mk_refinfo(const char *refname, const unsigned char *sha1)
177{
178 struct refinfo *ref;
179
180 ref = xmalloc(sizeof (struct refinfo));
181 ref->refname = xstrdup(refname);
182 ref->object = parse_object(sha1);
183 switch (ref->object->type) {
184 case OBJ_TAG:
185 ref->tag = cgit_parse_tag((struct tag *)ref->object);
186 break;
187 case OBJ_COMMIT:
188 ref->commit = cgit_parse_commit((struct commit *)ref->object);
189 break;
190 }
191 return ref;
192}
193
194static void cgit_free_taginfo(struct taginfo *tag)
195{
196 if (tag->tagger)
197 free(tag->tagger);
198 if (tag->tagger_email)
199 free(tag->tagger_email);
200 if (tag->msg)
201 free(tag->msg);
202 free(tag);
203}
204
205static void cgit_free_refinfo(struct refinfo *ref)
206{
207 if (ref->refname)
208 free((char *)ref->refname);
209 switch (ref->object->type) {
210 case OBJ_TAG:
211 cgit_free_taginfo(ref->tag);
212 break;
213 case OBJ_COMMIT:
214 cgit_free_commitinfo(ref->commit);
215 break;
216 }
217 free(ref);
218}
219
220void cgit_free_reflist_inner(struct reflist *list)
221{
222 int i;
223
224 for (i = 0; i < list->count; i++) {
225 cgit_free_refinfo(list->refs[i]);
226 }
227 free(list->refs);
228}
229
230int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags,
231 void *cb_data)
232{
233 struct reflist *list = (struct reflist *)cb_data;
234 struct refinfo *info = cgit_mk_refinfo(refname, sha1);
235
236 if (info)
237 cgit_add_ref(list, info);
238 return 0;
239}
240
241static void cgit_diff_tree_cb(struct diff_queue_struct *q,
242 struct diff_options *options, void *data)
243{
244 int i;
245
246 for (i = 0; i < q->nr; i++) {
247 if (q->queue[i]->status == 'U')
248 continue;
249 ((filepair_fn)data)(q->queue[i]);
250 }
251}
252
253static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
254{
255 enum object_type type;
256
257 if (is_null_sha1(sha1)) {
258 file->ptr = (char *)"";
259 file->size = 0;
260 } else {
261 file->ptr = read_sha1_file(sha1, &type,
262 (unsigned long *)&file->size);
263 }
264 return 1;
265}
266
267/*
268 * Receive diff-buffers from xdiff and concatenate them as
269 * needed across multiple callbacks.
270 *
271 * This is basically a copy of xdiff-interface.c/xdiff_outf(),
272 * ripped from git and modified to use globals instead of
273 * a special callback-struct.
274 */
275char *diffbuf = NULL;
276int buflen = 0;
277
278static int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
279{
280 int i;
281
282 for (i = 0; i < nbuf; i++) {
283 if (mb[i].ptr[mb[i].size-1] != '\n') {
284 /* Incomplete line */
285 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
286 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
287 buflen += mb[i].size;
288 continue;
289 }
290
291 /* we have a complete line */
292 if (!diffbuf) {
293 ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
294 continue;
295 }
296 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
297 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
298 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
299 free(diffbuf);
300 diffbuf = NULL;
301 buflen = 0;
302 }
303 if (diffbuf) {
304 ((linediff_fn)priv)(diffbuf, buflen);
305 free(diffbuf);
306 diffbuf = NULL;
307 buflen = 0;
308 }
309 return 0;
310}
311
312int cgit_diff_files(const unsigned char *old_sha1,
313 const unsigned char *new_sha1, unsigned long *old_size,
314 unsigned long *new_size, int *binary, int context,
315 int ignorews, linediff_fn fn)
316{
317 mmfile_t file1, file2;
318 xpparam_t diff_params;
319 xdemitconf_t emit_params;
320 xdemitcb_t emit_cb;
321
322 if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
323 return 1;
324
325 *old_size = file1.size;
326 *new_size = file2.size;
327
328 if ((file1.ptr && buffer_is_binary(file1.ptr, file1.size)) ||
329 (file2.ptr && buffer_is_binary(file2.ptr, file2.size))) {
330 *binary = 1;
331 if (file1.size)
332 free(file1.ptr);
333 if (file2.size)
334 free(file2.ptr);
335 return 0;
336 }
337
338 memset(&diff_params, 0, sizeof(diff_params));
339 memset(&emit_params, 0, sizeof(emit_params));
340 memset(&emit_cb, 0, sizeof(emit_cb));
341 diff_params.flags = XDF_NEED_MINIMAL;
342 if (ignorews)
343 diff_params.flags |= XDF_IGNORE_WHITESPACE;
344 emit_params.ctxlen = context > 0 ? context : 3;
345 emit_params.flags = XDL_EMIT_FUNCNAMES;
346 emit_cb.outf = filediff_cb;
347 emit_cb.priv = fn;
348 xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
349 if (file1.size)
350 free(file1.ptr);
351 if (file2.size)
352 free(file2.ptr);
353 return 0;
354}
355
356void cgit_diff_tree(const unsigned char *old_sha1,
357 const unsigned char *new_sha1,
358 filepair_fn fn, const char *prefix, int ignorews)
359{
360 struct diff_options opt;
361 struct pathspec_item item;
362
363 diff_setup(&opt);
364 opt.output_format = DIFF_FORMAT_CALLBACK;
365 opt.detect_rename = 1;
366 opt.rename_limit = ctx.cfg.renamelimit;
367 DIFF_OPT_SET(&opt, RECURSIVE);
368 if (ignorews)
369 DIFF_XDL_SET(&opt, IGNORE_WHITESPACE);
370 opt.format_callback = cgit_diff_tree_cb;
371 opt.format_callback_data = fn;
372 if (prefix) {
373 item.match = prefix;
374 item.len = strlen(prefix);
375 opt.pathspec.nr = 1;
376 opt.pathspec.items = &item;
377 }
378 diff_setup_done(&opt);
379
380 if (old_sha1 && !is_null_sha1(old_sha1))
381 diff_tree_sha1(old_sha1, new_sha1, "", &opt);
382 else
383 diff_root_tree_sha1(new_sha1, "", &opt);
384 diffcore_std(&opt);
385 diff_flush(&opt);
386}
387
388void cgit_diff_commit(struct commit *commit, filepair_fn fn, const char *prefix)
389{
390 unsigned char *old_sha1 = NULL;
391
392 if (commit->parents)
393 old_sha1 = commit->parents->item->object.sha1;
394 cgit_diff_tree(old_sha1, commit->object.sha1, fn, prefix,
395 ctx.qry.ignorews);
396}
397
398int cgit_parse_snapshots_mask(const char *str)
399{
400 const struct cgit_snapshot_format *f;
401 static const char *delim = " \t,:/|;";
402 int tl, sl, rv = 0;
403
404 /* favor legacy setting */
405 if (atoi(str))
406 return 1;
407 for (;;) {
408 str += strspn(str, delim);
409 tl = strcspn(str, delim);
410 if (!tl)
411 break;
412 for (f = cgit_snapshot_formats; f->suffix; f++) {
413 sl = strlen(f->suffix);
414 if ((tl == sl && !strncmp(f->suffix, str, tl)) ||
415 (tl == sl - 1 && !strncmp(f->suffix + 1, str, tl - 1))) {
416 rv |= f->bit;
417 break;
418 }
419 }
420 str += tl;
421 }
422 return rv;
423}
424
425typedef struct {
426 char * name;
427 char * value;
428} cgit_env_var;
429
430void cgit_prepare_repo_env(struct cgit_repo * repo)
431{
432 cgit_env_var env_vars[] = {
433 { .name = "CGIT_REPO_URL", .value = repo->url },
434 { .name = "CGIT_REPO_NAME", .value = repo->name },
435 { .name = "CGIT_REPO_PATH", .value = repo->path },
436 { .name = "CGIT_REPO_OWNER", .value = repo->owner },
437 { .name = "CGIT_REPO_DEFBRANCH", .value = repo->defbranch },
438 { .name = "CGIT_REPO_SECTION", .value = repo->section },
439 { .name = "CGIT_REPO_CLONE_URL", .value = repo->clone_url }
440 };
441 int env_var_count = ARRAY_SIZE(env_vars);
442 cgit_env_var *p, *q;
443 static char *warn = "cgit warning: failed to set env: %s=%s\n";
444
445 p = env_vars;
446 q = p + env_var_count;
447 for (; p < q; p++)
448 if (p->value && setenv(p->name, p->value, 1))
449 fprintf(stderr, warn, p->name, p->value);
450}
451
452int cgit_open_filter(struct cgit_filter *filter)
453{
454
455 filter->old_stdout = chk_positive(dup(STDOUT_FILENO),
456 "Unable to duplicate STDOUT");
457 chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess");
458 filter->pid = chk_non_negative(fork(), "Unable to create subprocess");
459 if (filter->pid == 0) {
460 close(filter->pipe_fh[1]);
461 chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO),
462 "Unable to use pipe as STDIN");
463 execvp(filter->cmd, filter->argv);
464 die("Unable to exec subprocess %s: %s (%d)", filter->cmd,
465 strerror(errno), errno);
466 }
467 close(filter->pipe_fh[0]);
468 chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO),
469 "Unable to use pipe as STDOUT");
470 close(filter->pipe_fh[1]);
471 return 0;
472}
473
474int cgit_close_filter(struct cgit_filter *filter)
475{
476 chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO),
477 "Unable to restore STDOUT");
478 close(filter->old_stdout);
479 if (filter->pid < 0)
480 return 0;
481 waitpid(filter->pid, &filter->exitstatus, 0);
482 if (WIFEXITED(filter->exitstatus) && !WEXITSTATUS(filter->exitstatus))
483 return 0;
484 die("Subprocess %s exited abnormally", filter->cmd);
485}
486
487/* Read the content of the specified file into a newly allocated buffer,
488 * zeroterminate the buffer and return 0 on success, errno otherwise.
489 */
490int readfile(const char *path, char **buf, size_t *size)
491{
492 int fd, e;
493 struct stat st;
494
495 fd = open(path, O_RDONLY);
496 if (fd == -1)
497 return errno;
498 if (fstat(fd, &st)) {
499 e = errno;
500 close(fd);
501 return e;
502 }
503 if (!S_ISREG(st.st_mode)) {
504 close(fd);
505 return EISDIR;
506 }
507 *buf = xmalloc(st.st_size + 1);
508 *size = read_in_full(fd, *buf, st.st_size);
509 e = errno;
510 (*buf)[*size] = '\0';
511 close(fd);
512 return (*size == st.st_size ? 0 : e);
513}
514
515static int is_token_char(char c)
516{
517 return isalnum(c) || c == '_';
518}
519
520/* Replace name with getenv(name), return pointer to zero-terminating char
521 */
522static char *expand_macro(char *name, int maxlength)
523{
524 char *value;
525 int len;
526
527 len = 0;
528 value = getenv(name);
529 if (value) {
530 len = strlen(value);
531 if (len > maxlength)
532 len = maxlength;
533 strncpy(name, value, len);
534 }
535 return name + len;
536}
537
538#define EXPBUFSIZE (1024 * 8)
539
540/* Replace all tokens prefixed by '$' in the specified text with the
541 * value of the named environment variable.
542 * NB: the return value is a static buffer, i.e. it must be strdup'd
543 * by the caller.
544 */
545char *expand_macros(const char *txt)
546{
547 static char result[EXPBUFSIZE];
548 char *p, *start;
549 int len;
550
551 p = result;
552 start = NULL;
553 while (p < result + EXPBUFSIZE - 1 && txt && *txt) {
554 *p = *txt;
555 if (start) {
556 if (!is_token_char(*txt)) {
557 if (p - start > 0) {
558 *p = '\0';
559 len = result + EXPBUFSIZE - start - 1;
560 p = expand_macro(start, len) - 1;
561 }
562 start = NULL;
563 txt--;
564 }
565 p++;
566 txt++;
567 continue;
568 }
569 if (*txt == '$') {
570 start = p;
571 txt++;
572 continue;
573 }
574 p++;
575 txt++;
576 }
577 *p = '\0';
578 if (start && p - start > 0) {
579 len = result + EXPBUFSIZE - start - 1;
580 p = expand_macro(start, len);
581 *p = '\0';
582 }
583 return result;
584}